Lathe-dog.



No. 659,|o6. Fammi oct. 2, |900. G. w. scHELLENBAcH.

LATI-IE DOG.

(Application filed May 19, 1900.)

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UNITED STATES PATENT OFFICE.

GEORGE `W. SCHELLENBACH, OF JOPLIN, MISSOURI.

LATHE-Doe.-

SPECIFICATION forming part of Letters Patent No. 659,106, dated October2, 1900.

Application iled May 19 1900.

T0 all whom, it may con/cern:

Be it known that I, GEORGE W. SCHELLEN- BACH, a citizen of the UnitedStates, and a resident of Joplin, in the county of Jasper and State ofMissouri, have invented a new and Improved Lathe-Dog, of which thefollowing is a full, clear, and exact description.

The purpose of this invention is to provide a lathe-dog which may bemore conveniently and securely itted to the work than those heretoforein use and also in which adjustments of a much wider range may be had.

This speciiication is the disclosure of one form of the invention, whilethe claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure l is a perspective View of the invention with the parts in openposition. Fig. 2 is a sectional view with the parts closed, and Fig. 3is a plan View of the dog as in Fig. 2.

The lathe-dog has a base portion a, forming the main or stationary jaw,from one end of which a tail b projects,a to be used in the usualmanner. Rigidly carried on the end of the jaw et at which the tail issecured is an arm c, the outer side of which is formed with transverselydisposed notches c therein. This arm c is fitted in an opening d',formed in the upper or movable jaw el. This jaw is provided with a pind2, which passes transversely through the opening d and forms atooth-like projection on one wall of said opening, such pin beingadapted to lie in any one of the notches c', as shown. A key e iscarried on the free end of a spring e', the other end of which isfastened to the top of the jaw d, the key being placed so that it mayproject into the opening d and hold the jaw d, with the pin cl2, engagedwith the walls of the appropriate notch c, and thus prevent the movementof the jaw d on thearm c. By raising the key e, as shown in Fig. 1, thejaw d may be moved to any desired position on the arm c. The end of thejaw a opposite to the arm c carries pivotally a screw f, the freeportion of which is adapted to swing through a longitudinallydisposedslot d3 in the end of the jaw d opposite the opening d. A duplex nutcompris- Seral No. 17,285. (No model.)

ing a square upper part g and a hexagonal lower part g works on thescrewf, and by means of this nut the jaw d may be forced down toward thejaw d, it being understood that the jaw CZ may have slight swingingmovement on the arm c, notwithstanding that the key e is in place, sincethe pin d2 forms a pivot upon which the jaw d may have limited swingingmovement. The working faces of the jaws a, and d may benotched, asshown, or shaped in any other manner desired to cause them effectivelyto engage the work, which is represented at 7i in Fig. 2.

The use of my invention will be fully understood by those skilled in theart. It only remainsfor me to point out that by the construction which Ihave devised the dog may be very rapidly adjusted to and secured on thework and that a much wider range of ad- -justment may be had with thisdevice than with those usually employed.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. A lathe-dog having two jaws, an arm connecting thesame, one of the jaws having an opening through which the arm is looselypassed, and the arm being formed with a notch or notches therein adaptedto receive a tooth-like portion of the jaw having the opening, a keyadapted to fit in the opening to secure the jaw on the arm, and a springmounted on the jaw and carrying the key.

2. A lathe-dog, having two jaws, one of which has an opening thereinwith a toothlike projection on one of its Walls, an arm attached to theother jaw and projected through the opening in the rst-named jaw, thearm being formed with notches the walls of which are engaged by the saidtooth-like projection on the irst-namedA jaw, and a removable keyserving to hold the arm in the opening of the first-named jaw.

In testimony whereof I have signed my name to .this specification in thepresence of two subscribing witnesses.

GEORGE W. SCHELLENBAOI-I.

Witnesses:

C. E. DAVIS, FEED Cook.

